发明授权
- 专利标题： Optical disc apparatus and optical disc discriminating method
- 专利标题（中）： 光盘装置和光盘识别方法
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申请号： US13116086申请日： 2011-05-26
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公开(公告)号： US08498187B2公开(公告)日： 2013-07-30
- 发明人: Takeyoshi Kataoka
- 申请人： Takeyoshi Kataoka
- 申请人地址： JP Tokyo JP Tokyo
- 专利权人： Hitachi-LG Data Storage, Inc.,Hitachi Consumer Electronics Co., Ltd.
- 当前专利权人： Hitachi-LG Data Storage, Inc.,Hitachi Consumer Electronics Co., Ltd.
- 当前专利权人地址： JP Tokyo JP Tokyo
- 代理机构： Antonelli, Terry, Stout & Kraus, LLP.
- 优先权： JP2010-123725 20100531
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
In an optical disk having multiple layers for which a correction of spherical aberration is required, a spherical aberration correcting element is set to a predetermined spherical aberration correction amount; a laser light source is turned ON; an objective lens is swept; when it is discriminated that the optical disk has two or more layers, or has more than two information recording planes, the spherical aberration correction amount is changed into a spherical aberration correction amount suitable for information recording planes of three, or more layers; and the objective lens is again swept so as to discriminate a total layer number thereof.
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